How do I hide the text that the user enters into a password JTextField?

I have a class that asks for a username and password to autenticate a user in the application. Inside it, I have 2 JTextField objects, one for the username input and one for the password input. ``` JTextField userNameTextField = new JTextField(20); JTextField pswdTextField = new JTextField(20); ``` It works fine but my problem is that, when the user writes the password in the pswdTextField, the password is shown inside it. I want to hide it by showing a dot, asterisk or similar for each letter that makes up the inserted password. How is this done?